Soldering-iron.



H. KUHN.

SOLDERNG IRON.

APPLICATION FILED sEPT.4. |915.

-- Patented Jan. 30, 1917.

j'tao duced 'prefera ed by BUBEBT KUHN', OF DETROIT, MICHIGAN.

.SOLDERING-IBON.

Specification of Letters Patent.

Patented J an. 30, 1917.

Application led September 4, 1915. Serial No. `48,968.

To all 'whom 'it may concern:

-Be it known that I, RoBE'R'r KUHN, a citizen of the United States of America, residing at Detroit, in the county of Wayne and `State of Michi an, have invented certain new'and useful i mprovements in Soldering- Irons, of which the following is a specification, reference-being had therein to theaccompanying drawings. l

The invention relates to electrically heated tools, being more particularly designed for use Ain electrically heated soldering irons, and the invention comprises the novel construction as hereinafter set forth.

In the drawing: Figure 1 is a sectional elevation of the casing; Fig. 2 is an elevation of the heating unit insertible in said casing; Fig.l 3 is an enlarged section of the securing joint between the heating unit and casing; Fig. 4 is a section on line :1i-m of Fig. 3; and Fig. 5 is an elevation of thecompleted instrument. g A is the heating element, which is in the form of a centrally recessed body surroundthe heating resistor. 4

B 1s the tool insertible in the recess in said body, and locked in position by suitable means such as the dog C. 4

D are electric terminals extending from the resistor E, which surrounds the body A, op ositely from the tool B. n

o incase the instrument and also to form a 'handle connection therefor, I have provided af casing F, preferably formed. of drawn tubing, and having a cylindrical p0rtion G forreceivin the member A. Adjacent to this c 1in rical'v portion' is a replortion which is cut away at I,

ly upon 'opposite sides thereof. Adjacent to the J, which -at .its end' is provided with a threaded member K for engagement with a hollow handle L.' The member K is also adapted for attachment'to an insulator block M upon which the electrical terminals are mounted and attached to the flexible conductor cord N.'

To secure ythe member A -within the 'portion 4G of the casing, said member-is provided' at its inner end with segments O externaily threaded and of a diameter slightl in cf the .diameter of the portion "oi-tion H is a shank portion These segments are` adapted to fit in the cutaway portions I'of the member F with the threaded portion projecting outward as shown in igs. -3 and 4. The ring nu't P 1s then engaged with the threads of the segments O and secured against the shoulder of the casing.v `This will securely hold the member A from displacement while the ring B will conceal the cut-away portions ofthe casing. The terminals D pass through the hollow shank of the casing to the insulator terminal block M, and the hollow handle L is then secuied by means forming no part of the present invention.

What I claim as my invention is 1. The combination with a cylindrical heating unit and terminals-extendfln from one end thereof, of a casing for said unit formed of continuous tubing having a cy lindrical portion for receiving said unit. anda reduced shank portion'for receiving partly cut away, a Athreaded segment uponV said unit enga ng said cut-away portion, and an linterna ly threaded ring surrounding saidreduce'd portion and engaging'said threaded-segment;

3. The combination4 withV a 'cylindrical heating unit and terminals'projecting from one end thereof, of a casingfor said unit comprisin tubing having a cylindrical portion, a re uced portion partly cut-away with a shoulder therebetween against which one end of said unit4 is adapted to bear, a threaded segment on said 4unit for engagin cut-away portion and an internallv t readed ring sur-rounding said reduced portion, engaging said unit against said shoulder. 4 .i

4. lI n an'electically heated instrument, the combination with a cylindrical heating -unit' havin end thereo of, a casing for saidunit formed 'of 'tubing having a cylindrical portion for receiving the'unit, a reduced shank portion for receiving theterminals and en interni@ terminals extending from one l segment and clamping ,sa-id i diate portion partially out away and form'- ing a shoulder between theL same and said cylindrical portion, a threaded segment on said heating unit engaging said cut-away portion, and an internally threaded ring surrounding said intermediate portion and engaging said threaded segment.

In testimony whereof I aix my signature 1n presence of two Witnesses.

ROBERT KUHN.

lWitnesses:

C. H. KEUTELSTERZ, W. R. SCRANTON. 

